Attachment for watch-lathes.



No. 634,787 Patented But. ID, T899.

0. M. WILLIS.

ATTACHMENT FOR WATCH LATHES.

(Applienfipn Jan. 7, 1899.)

(No Modal.)

WITNESSES U ITE STATES PATENT OFFICE.

CHARLES MARsnAL WILLIS, OF snowns, ILLINOIS.

A-TTACH AGENT FOR WATCH-LATH ES.

sPEcIFIcArIon forming part of Letters Patent No. 634,787, dated October 10, 1899.

Application filed January 7, 1899. $eria1Nm7DL48'7. (No model.)

To all whom. it may concern.-

Be it known that I, CHARLES M RSHAL- actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a front view of the invention, partly in section, on the line 1 1 of Fig. 2. Fig. 2 is a side elevation of the invention, with parts in section, on the line 2 2 of Fig. 1.

Fig. 3 is a front view of theinvention, show-- ing it applied to a use different from that shown in Fig. 1. Fig. 4 is a sectional view on the line at 4 of Fig. 3. Fig; 5 is a front view showing certain hereinafter-fully-described attachments to my invention. Fig.' 6 is a side elevation of the same, and Fig. 7 is a detail perspective view showing one of the parts illustrated in Figs. 5 and 6 and hereinafter more fully described.

Referring to Figs. 1 and 2, the carriage 8 of the lathe supports a shaft 9, which holds a circular plate or disk 10, provided with three equidistant openings 11 in its outer portion and with three equidistantcurved slots 12, extending from the center of the plate outward. The disk may be made to. hold either a piece of work 14, as shown in Figs. 1 and 2, or it may be made to carry a work-holder 15, as shown in Figs. 3 and 4. For the purpose of attaching these parts 14 or 15the disk 10 is provided with clamping-fingers 16, each of which has a screw 17 threaded therein and provided with a head 18. .By means of the screws 17 and heads 18 the fingers 16 may be adjustably attached to the plate'lO and and 4:. When used as-in Figs. 1 and 2, the

screws 17 should be passed through the slots 12, and when used as in Figs. 3 and 4 the screws '17 should be passed'through the openings 11. In other words, the screws may be shifted from the slots to the openings, ac-

' cording to the convenience of the workman.

thickened central portion 19, in which is formed an essentially V-shaped opening 20, adapted to receive the work to be held. Workin g in the thickened portion 19 is a clampingplate 21, actuated by a screw 22, which. is held in a bearing 23, rigid on the disk 15. In using this device it is mounted on the disk 10 in the manner shown in Figs. 3 and 4:, and the work is held in the opening 20 by the clamping-plate 21.

1 My invention also embodies (see Figs. 5, 6, and 7) means for attaching spindles 24 to the disk 10, such spindles serving to hold in position various parts of the work-401 example, the wheels of a watch-movement, should such wheels be carried on the piece of work let shown in Figs. 5 and 6. These means referred-to consist in angular arms 25, having collars 26 at their bases, which collars bear against the frontface of the disk 10. The arms are also provided with screws 27, projecting from the collars and carrying nuts 28, which nuts are adapted to bear against the rear face of the disk 10 to clamp the arms 25 in adjustment on the disk. The spindles 2 1 (one of which is shown both in Figs. 6 and 7) will be held in passages in the ends of the arms 25 by means of jam-nuts orother securing devices 29.

Y The invention may be used in a great many connections and for a wide range of work, as will be obvious to a mechanic. The uses here bilities of its practical employment.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent- 1. An attachment for lathes, comprising a disk provided with equidistant openings near its periphery, and radial slots between the openings, and clamping-fingers adapted to be secured to the disk byhavingtheir fastening devices passed either through the said openings or slots, whereby provision is made for securing a piece of work or a work-holder to the disk, as set forth.

2. An attachment for lathes, comprising a disk having equidistant openings near its periphery, and curved radial slots between said openings, clamping-fingers, and headed screws for securing the clamping-fingers to the disks by being passed either through the openings or slots, as and for the purpose set forth.

3. In an attachment for lathes, the combination of a disk, of a Work-holder, comprising a disk With an enlarged central portion having a Vshaped opening, a clamping-plate slidably held in the said enlarged portion and adapted to engage and hold the work in the said opening, and clamping-fingers carried by the first-ham ed disk and engaging the second disk to hold it on the said first-named disk, substantially as described.

4. In an attachment for lathes, the combination of a disk, a clamping-finger adjustably mounted on the disk, a second disk held 011 the first disk by the clamping-finger and having a central opening therein, and a clamp ing-plate movable radially on the second disk and into the opening thereof.

5. In an attachment for 1athes, the combination of a disk provided with means for clamping a part thereon, an arm adj ustably mounted on the disk, and a spindle carried by the arm and adapted to form a bearing for a part of the work that is held on the disk.

6. In an attachment for lathes, the combination with a disk providedwith openings, and clamping-fingers for securing a wheel to thedisk, of an angular arm having one member provided with means for securing the arm in an opening in the disk and its other member with means for receiving and holding the spindle of the wheel carried by the disk, substantially as described.

CHARLES MARSHAL XVILLIS.

Witnesses:

WILLIAM T. HENDERSON, J AMES TOMLINSON. 

